DG417BAK Equivalent & Substitute Parts

Part Overview

The DG417BAK is a single-circuit SPST-NC (Normally Closed) analog switch manufactured by Vishay Siliconix, designed for interface applications requiring low on-state resistance and fast switching performance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity. The DG417BAK operates across a wide supply voltage range and delivers predictable switching characteristics suitable for precision signal routing applications.

Substiute Parts

DG417BAK

Vishay SiliconixIn Stock: 1116DG417BAK Datasheet

Current PartRFQ

ADG417BNZ

Analog Devices Inc.In Stock: 1660ADG417BNZ Datasheet

MFR RecommendedRFQ

DG417AK/883B

Analog Devices Inc./Maxim IntegratedIn Stock: 1171DG417AK/883B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DG417BAK is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Switch circuit configuration: SPST - NC topology
• Multiplexer/Demultiplexer circuit: 1:1 ratio
• Number of circuits: 1
• On-state resistance: 35Ohm maximum
• Current leakage specification: 250pA maximum
• Mounting type: Through Hole
• Package compatibility: 8-pin DIP or CDIP form factor

Secondary Compatibility Factors:

• Supply voltage ranges must encompass or match the application requirements
• Operating temperature range must satisfy system thermal specifications
• Switch timing parameters (Ton, Toff) must not exceed application switching speed requirements
• Charge injection and channel capacitance values must be acceptable for signal integrity in the target circuit

The two substitute parts identified below meet these core electrical and mechanical criteria, though with variations in secondary parameters that must be evaluated against specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

ADG417BNZ (Analog Devices Inc.)

The ADG417BNZ is an active product with ROHS3 compliance, offering improved signal integrity characteristics compared to the DG417BAK. Charge injection is reduced to 7pC (versus 38pC), and channel capacitance is halved to 6pF. However, the single supply voltage specification (12V) is more restrictive than the DG417BAK's 13V ~ 36V range, and the dual supply is fixed at ±15V. Operating temperature range is narrower (-40°C ~ 85°C). Switch timing is slower (160ns, 100ns). This substitute is suitable for applications where the supply voltage constraints are acceptable and where reduced charge injection provides system-level benefits.

DG417AK/883B (Analog Devices Inc./Maxim Integrated)

The DG417AK/883B maintains the 8-CERDIP package form factor identical to the DG417BAK and is an active product with ROHS3 compliance. This part offers the most favorable charge injection (3pC) and channel capacitance (8pF) characteristics. Supply voltage range (10V ~ 30V single, ±4.5V ~ 20V dual) overlaps substantially with the DG417BAK. However, the operating temperature range is restricted to 0°C ~ 70°C, and switch timing is slower (175ns, 145ns). Channel-to-channel matching is specified at 3Ohm maximum, and crosstalk is specified at -85dB @ 1MHz. This substitute is optimal for applications prioritizing low charge injection and matching the original package footprint, provided temperature and timing constraints are satisfied.

Frequently Asked Questions (FAQ)

Q: Can ADG417BNZ be used as a direct pin-for-pin replacement for DG417BAK?

A: Both parts use 8-pin DIP packages with 0.300" (7.62mm) spacing and are through-hole mounted. Pin compatibility requires verification against the specific application schematic. The ADG417BNZ uses 8-PDIP packaging while the DG417BAK uses 8-CDIP; both are mechanically compatible with standard 8-pin DIP sockets.

Q: What are the key differences in supply voltage specifications?

A: The DG417BAK supports 13V ~ 36V (single supply) and ±7V ~ 22V (dual supply). The ADG417BNZ is limited to 12V (single) and ±15V (dual), which may not accommodate applications requiring the full 36V upper limit. The DG417AK/883B provides 10V ~ 30V (single) and ±4.5V ~ 20V (dual), offering broader flexibility than ADG417BNZ but narrower than the original part.

Q: How do switching speed differences affect circuit performance?

A: The DG417BAK specifies maximum switch times of 62ns (Ton) and 53ns (Toff). Both substitutes are slower: ADG417BNZ at 160ns and 100ns, and DG417AK/883B at 175ns and 145ns. Applications requiring sub-100ns switching response must evaluate whether the slower substitutes introduce unacceptable timing margins.

Q: What is the significance of charge injection differences?

A: Charge injection affects signal accuracy in precision analog circuits. The DG417BAK injects 38pC, while ADG417BNZ injects 7pC and DG417AK/883B injects only 3pC. Lower charge injection reduces signal distortion and is beneficial for high-resolution data acquisition and audio applications.

Q: Are there temperature range limitations with the substitutes?

A: The DG417BAK operates from -55°C to 125°C. ADG417BNZ is limited to -40°C to 85°C, and DG417AK/883B to 0°C to 70°C. Applications requiring full military-grade temperature range (-55°C to 125°C) cannot use either substitute without design modification or thermal management constraints.

Q: What is the RoHS compliance status, and does it matter?

A: The DG417BAK is RoHS non-compliant. Both ADG417BNZ and DG417AK/883B are ROHS3 compliant. New designs and procurement for regulated markets typically require RoHS compliance; legacy systems using DG417BAK may continue operation without compliance pressure.

Q: How do leakage current specifications compare?

A: All three parts specify identical maximum leakage current (IS(off)) of 250pA, ensuring equivalent off-state isolation performance across substitution options.